1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __ASM_SH_ELF_H
3 #define __ASM_SH_ELF_H
4
5 #include <linux/utsname.h>
6 #include <asm/auxvec.h>
7 #include <asm/ptrace.h>
8 #include <asm/user.h>
9
10 /* ELF header e_flags defines */
11 #define EF_SH_PIC 0x100 /* -fpic */
12 #define EF_SH_FDPIC 0x8000 /* -mfdpic */
13
14 /* SH (particularly SHcompact) relocation types */
15 #define R_SH_NONE 0
16 #define R_SH_DIR32 1
17 #define R_SH_REL32 2
18 #define R_SH_DIR8WPN 3
19 #define R_SH_IND12W 4
20 #define R_SH_DIR8WPL 5
21 #define R_SH_DIR8WPZ 6
22 #define R_SH_DIR8BP 7
23 #define R_SH_DIR8W 8
24 #define R_SH_DIR8L 9
25 #define R_SH_SWITCH16 25
26 #define R_SH_SWITCH32 26
27 #define R_SH_USES 27
28 #define R_SH_COUNT 28
29 #define R_SH_ALIGN 29
30 #define R_SH_CODE 30
31 #define R_SH_DATA 31
32 #define R_SH_LABEL 32
33 #define R_SH_SWITCH8 33
34 #define R_SH_GNU_VTINHERIT 34
35 #define R_SH_GNU_VTENTRY 35
36 #define R_SH_TLS_GD_32 144
37 #define R_SH_TLS_LD_32 145
38 #define R_SH_TLS_LDO_32 146
39 #define R_SH_TLS_IE_32 147
40 #define R_SH_TLS_LE_32 148
41 #define R_SH_TLS_DTPMOD32 149
42 #define R_SH_TLS_DTPOFF32 150
43 #define R_SH_TLS_TPOFF32 151
44 #define R_SH_GOT32 160
45 #define R_SH_PLT32 161
46 #define R_SH_COPY 162
47 #define R_SH_GLOB_DAT 163
48 #define R_SH_JMP_SLOT 164
49 #define R_SH_RELATIVE 165
50 #define R_SH_GOTOFF 166
51 #define R_SH_GOTPC 167
52
53 /* FDPIC relocs */
54 #define R_SH_GOT20 201
55 #define R_SH_GOTOFF20 202
56 #define R_SH_GOTFUNCDESC 203
57 #define R_SH_GOTFUNCDESC20 204
58 #define R_SH_GOTOFFFUNCDESC 205
59 #define R_SH_GOTOFFFUNCDESC20 206
60 #define R_SH_FUNCDESC 207
61 #define R_SH_FUNCDESC_VALUE 208
62
63 /* SHmedia relocs */
64 #define R_SH_IMM_LOW16 246
65 #define R_SH_IMM_LOW16_PCREL 247
66 #define R_SH_IMM_MEDLOW16 248
67 #define R_SH_IMM_MEDLOW16_PCREL 249
68 /* Keep this the last entry. */
69 #define R_SH_NUM 256
70
71 /*
72 * ELF register definitions..
73 */
74
75 typedef unsigned long elf_greg_t;
76
77 #define ELF_NGREG (sizeof (struct pt_regs) / sizeof(elf_greg_t))
78 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
79
80 typedef struct user_fpu_struct elf_fpregset_t;
81
82 /*
83 * These are used to set parameters in the core dumps.
84 */
85 #define ELF_CLASS ELFCLASS32
86 #ifdef __LITTLE_ENDIAN__
87 #define ELF_DATA ELFDATA2LSB
88 #else
89 #define ELF_DATA ELFDATA2MSB
90 #endif
91 #define ELF_ARCH EM_SH
92
93 /*
94 * This is used to ensure we don't load something for the wrong architecture.
95 */
96 #define elf_check_arch(x) ((x)->e_machine == EM_SH)
97 #define elf_check_fdpic(x) ((x)->e_flags & EF_SH_FDPIC)
98 #define elf_check_const_displacement(x) ((x)->e_flags & EF_SH_PIC)
99
100 /*
101 * Enable dump using regset.
102 * This covers all of general/DSP/FPU regs.
103 */
104 #define CORE_DUMP_USE_REGSET
105
106 #define ELF_FDPIC_CORE_EFLAGS EF_SH_FDPIC
107 #define ELF_EXEC_PAGESIZE PAGE_SIZE
108
109 /* This is the location that an ET_DYN program is loaded if exec'ed. Typical
110 use of this is to invoke "./ld.so someprog" to test out a new version of
111 the loader. We need to make sure that it is out of the way of the program
112 that it will "exec", and that there is sufficient room for the brk. */
113
114 #define ELF_ET_DYN_BASE (2 * TASK_SIZE / 3)
115
116 #define ELF_CORE_COPY_REGS(_dest,_regs) \
117 memcpy((char *) &_dest, (char *) _regs, \
118 sizeof(struct pt_regs));
119
120 /* This yields a mask that user programs can use to figure out what
121 instruction set this CPU supports. This could be done in user space,
122 but it's not easy, and we've already done it here. */
123
124 #define ELF_HWCAP (boot_cpu_data.flags)
125
126 /* This yields a string that ld.so will use to load implementation
127 specific libraries for optimization. This is more specific in
128 intent than poking at uname or /proc/cpuinfo.
129
130 For the moment, we have only optimizations for the Intel generations,
131 but that could change... */
132
133 #define ELF_PLATFORM (utsname()->machine)
134
135 #define ELF_PLAT_INIT(_r, load_addr) \
136 do { _r->regs[0]=0; _r->regs[1]=0; _r->regs[2]=0; _r->regs[3]=0; \
137 _r->regs[4]=0; _r->regs[5]=0; _r->regs[6]=0; _r->regs[7]=0; \
138 _r->regs[8]=0; _r->regs[9]=0; _r->regs[10]=0; _r->regs[11]=0; \
139 _r->regs[12]=0; _r->regs[13]=0; _r->regs[14]=0; \
140 _r->sr = SR_FD; } while (0)
141
142 #define ELF_FDPIC_PLAT_INIT(_r, _exec_map_addr, _interp_map_addr, \
143 _dynamic_addr) \
144 do { \
145 _r->regs[0] = 0; \
146 _r->regs[1] = 0; \
147 _r->regs[2] = 0; \
148 _r->regs[3] = 0; \
149 _r->regs[4] = 0; \
150 _r->regs[5] = 0; \
151 _r->regs[6] = 0; \
152 _r->regs[7] = 0; \
153 _r->regs[8] = _exec_map_addr; \
154 _r->regs[9] = _interp_map_addr; \
155 _r->regs[10] = _dynamic_addr; \
156 _r->regs[11] = 0; \
157 _r->regs[12] = 0; \
158 _r->regs[13] = 0; \
159 _r->regs[14] = 0; \
160 _r->sr = SR_FD; \
161 } while (0)
162
163 #define SET_PERSONALITY(ex) \
164 set_personality(PER_LINUX_32BIT | (current->personality & (~PER_MASK)))
165
166 #ifdef CONFIG_VSYSCALL
167 /* vDSO has arch_setup_additional_pages */
168 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES
169 struct linux_binprm;
170 extern int arch_setup_additional_pages(struct linux_binprm *bprm,
171 int uses_interp);
172
173 extern unsigned int vdso_enabled;
174 extern void __kernel_vsyscall;
175
176 #define VDSO_BASE ((unsigned long)current->mm->context.vdso)
177 #define VDSO_SYM(x) (VDSO_BASE + (unsigned long)(x))
178
179 #define VSYSCALL_AUX_ENT \
180 if (vdso_enabled) \
181 NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_BASE); \
182 else \
183 NEW_AUX_ENT(AT_IGNORE, 0)
184 #else
185 #define VSYSCALL_AUX_ENT NEW_AUX_ENT(AT_IGNORE, 0)
186 #endif /* CONFIG_VSYSCALL */
187
188 #ifdef CONFIG_SH_FPU
189 #define FPU_AUX_ENT NEW_AUX_ENT(AT_FPUCW, FPSCR_INIT)
190 #else
191 #define FPU_AUX_ENT NEW_AUX_ENT(AT_IGNORE, 0)
192 #endif
193
194 extern int l1i_cache_shape, l1d_cache_shape, l2_cache_shape;
195
196 /* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
197 #define ARCH_DLINFO \
198 do { \
199 /* Optional FPU initialization */ \
200 FPU_AUX_ENT; \
201 \
202 /* Optional vsyscall entry */ \
203 VSYSCALL_AUX_ENT; \
204 \
205 /* Cache desc */ \
206 NEW_AUX_ENT(AT_L1I_CACHESHAPE, l1i_cache_shape); \
207 NEW_AUX_ENT(AT_L1D_CACHESHAPE, l1d_cache_shape); \
208 NEW_AUX_ENT(AT_L2_CACHESHAPE, l2_cache_shape); \
209 } while (0)
210
211 #endif /* __ASM_SH_ELF_H */
212
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